Water Pollution Holt Environmental Science

Which is a point source of pollution?

• Farm runoff

• A sewage treatment plant

• Storm runoff

• A suburban community

• A harbor

Eutrophication

• is the result of excess carbon

• causes low BOD

• can cause dead zones

• is rarely caused by human activities

• only occurs in fresh water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Fecal coliform bacteria

• is used as an indicator of water quality

• is the cause of many waterborne diseases

• is another name for Cryptosporidium

• usually causes diarrhea

• is rarely found in septage

Leach fields are

• used to remove sludge

• part of tertiary water treatment

• used to filter septage

• a result of sewage dumping

• often used with manure lagoons

A manure lagoon is being built for a dairy with 700 cows, each of which produces 40 L of manure each day. How large must the lagoon be to hold 30 days worth of manure?

• 21,000 L

• 28,000 L

• 120,000 L

• 560,000 L

• 840,000 L

Arsenic is

• found naturally in groundwater

• often discovered due to its rapid health effects

• inexpensive to remove from drinking water

• found in rainwater

• primarily found in water in North America

Tags

NGSS.MS-ESS3-1

Which is NOT true of acid deposition?

• It is primarily due to the burning of coal

• It is treated using limestone

• It can occur as a result of mining

• It is lethal to many aquatic organisms

• It causes increased solubility of many ions

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

What caused the eggshells of some birds to become thin and break?

• Heavy metal concentrations in prey species

• An inert ingredient in herbicides

• A pharmaceutical in the water supply

• An insecticide ingested by prey species

• A pesticide used to control pest birds such as crows

Tags

NGSS.MS-LS1-5

Mercury

• is harmless once converted into methylmercury

• exposure often occurs through shellfish

• is most concentrated in herbivores

• can be safely trapped during the production of concrete

• damages the immune system

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which hazardous material is known to cause cancer?

• Lead

• DDT

• Mercury

• Perchlorates

• PCBs